Hi Ivan,
thanks for your fast reply.
Yes, I can reproduce this with ISQL.
SQL> sparql select ?s ?p ?o where { ?s ?p ?o };
s p o
VARCHAR VARCHAR VARCHAR
_______________________________________________________________________________
NULL NULL NULL
1 Rows. -- 0 msec.
while sparql select ?s ?p ?o where { graph ?g {?s ?p ?o }};
returns everything. I'm using the /sparql/ endpoint with empty default
and named graphs, but all queries contains a list of FROM NAMED <uri>.
POST /sparql/?default_graph_uri=&named_graph_uri=
Best Regards,
Mikael
On 27/01/2008, Ivan Mikhailov <imikhai...@openlinksw.com> wrote:
> Hello Mikael,
>
> Virtuoso can query unspecified graphs so the issue is probably misused
> interface. Can you reproduce this problem by querying via ISQL? If yes
> then that is a real (and surprising) problem. If you're using /sparql/
> or /isparql/ web service endpoint then please check whether 'default
> graph' field contains graph name or empty. When empty then by triple
> patterns outside graph ... { ... } will be matched against at all
> graphs, when non-empty then they will be restricted to the specified
> graph. So if graph is specified but empty then you get nuthing without
> graph ?g { ... } and get everything with it.
>
> Best Regards,
> Ivan Mikhailov,
> OpenLink Software.
>
> On Sun, 2008-01-27 at 11:04 +0100, Mikael Högqvist wrote:
> > Hi,
> >
> > I'm using virtuoso 5.0.3 and have run into a problem with queries. I
> > expect that a query like
> >
> > select ?s ?p ?o where { ?s ?p ?o }
> >
> > would return all triples in the store. But it returns nothing, while this
> > query:
> >
> > select ?s ?p ?o where { graph ?g {?s ?p ?o }}
> >
> > returns all the triples. I did not run into this with earlier versions
> > of virtuoso and could not find any related configuration setting. All
> > graphs are indexed by uploading via WebDAV to an rdf_sink-directory.
> >
> > Is it possible to avoid "graph ?g { ... }"?.
> >
> > Thanks,
> > Mikael
>
>
>
